While neither classic nor vintage in the sense of this forum, I do have a HydeOut which is set up with spoilers. A small amount of down elevator is mixed in with the spoilers and there is no noticeable transition or jump as the spoilers deploy. But the plane does slow down better. Without them it will float a long way. With them deployed the landing is much more manageable.

Jeff
Skylane N9214G
SPA 243